Phonon‐supported pseudospin phase transition in graphene. Issue 4 (15th December 2015)

• Record Type: Journal Article
• Authors: Feng, Peng
• Is Part Of: Physica status solidi. Volume 253:Issue 4(2016)
• Page Start: 760
• Page End: 764
• Publication Date: 2015-12-15
• Subjects: graphene -- Hamiltonian -- phase transitions -- phonons -- photons -- pseudospins -- scattering; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201552525
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : The phonon‐induced polarization of pseudospins in graphene is investigated in this work. On the basis of detailed quantum statistical calculations, it is found that the pseudospin average value always undergoes a sign change as the temperature is lowered through some critical value. This shows that the phonons not only induce a pseudospin polarization, but also lead to a phase transition of pseudospins. This phonon‐induced pseudospin polarization is somewhat like the photon‐induced polarization. If a circularly polarized light participates in pseudospin polarization besides the phonons, a refrigerating effect would occur.